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Showing posts from July, 2021

Rewilding wild predators could regenerate the ecosystem

By Jeffrey Akhuetiemhe As some conservationists and researchers begin to return large carnivores to areas where they once roamed, scientists intensify efforts to study the ecological roles of these predators in the wild, while keeping in mind that losing large predators could have disruptive effects on the ecosystem. However, ecologists seldom investigate whether those negative effects can be reversed by restoring these predators back to their natural homes. Take the case of capybaras in South America for example. It was theorized that the population of capybaras might fall after the arrival of their ferocious predator, jaguars, which is expected in a prey-predator relationship. Also, scientists predicted that the behaviour of this animal might change, radically, because of the arrival of their predator. Before their arrival, capybaras were fearless in their community, oftentimes, some were seen dozing off on walk paths. But once they realized there were predators lurking about, they b...

The machine that could eavesdrop on the brain

By Festus Iyenahie A brush with death led Hans Berger to invent the machine that could eavesdrop on the brain. In 1893, when he was 19, Berger fell off his horse during manoeuvres training with the German military and was nearly trampled. On that same day, his sister, far away, got a bad feeling about Hans. She talked her father into sending a telegram asking if everything was all right. To young Berger, this eerie timing was no coincidence: It was a case of “spontaneous telepathy,” he later wrote. Hans was convinced that he had transmitted his thoughts of mortal fear to his sister — somehow. So he decided to study psychiatry, beginning a quest to uncover how thoughts could travel between people. Chasing after a scientific basis for telepathy was a dead end, of course. But in the attempt, Berger ended up making a key contribution to modern medicine and science: He invented the electroencephalogram, or EEG, a device that could read the brain’s electrical activity. Berger’s machine, firs...